10100020002121 has 4 divisors (see below), whose sum is σ = 11542880002432. Its totient is φ = 8657160001812.

The previous prime is 10100020002011. The next prime is 10100020002173. The reversal of 10100020002121 is 12120002000101.

10100020002121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 10100020002121 - 2²⁹ = 10099483131209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10100020002098 and 10100020002107.

It is not an unprimeable number, because it can be changed into a prime (10100020002181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 721430000145 + ... + 721430000158.

It is an arithmetic number, because the mean of its divisors is an integer number (2885720000608).

Almost surely, 2^{10100020002121} is an apocalyptic number.

It is an amenable number.

10100020002121 is a deficient number, since it is larger than the sum of its proper divisors (1442860000311).

10100020002121 is an equidigital number, since it uses as much as digits as its factorization.

10100020002121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1442860000310.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 10100020002121 its reverse (12120002000101), we get a palindrome (22220022002222).

The spelling of 10100020002121 in words is "ten trillion, one hundred billion, twenty million, two thousand, one hundred twenty-one".